Update the wins and losses fields in tmcareer.dbf. Those fields are SHWINS (Season Home Wins), SHLOSSES (Season Home Losses), SAWINS (Season Away Wins) and SALOSSES (Season Away Losses).
In NBA Live 07, the entries you'd need to edit should have 2005 as the year, for the 2005/2006 season (which was the previous year). Normally we'd refer to that as the 2006 season but tmcareer.dbf uses the first year of the season for whatever reason.